[libsigrok.git] / src / binary_helpers.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2020 Andreas Sandberg <andreas@sandberg.pp.se>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <glib.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

SR_PRIV int bv_get_value_len(float *out, const struct binary_value_spec *spec,
	const uint8_t *data, size_t length)
{
	float value;

	if (!out || !spec || !data)
		return SR_ERR_ARG;

#define VALUE_TYPE(T, R, L)				\
	case T:						\
		if (spec->offset + (L) > length)	\
			return SR_ERR_DATA;		\
		value = R(data + spec->offset);		\
		break

	switch (spec->type) {
	VALUE_TYPE(BVT_UINT8, read_u8, sizeof(uint8_t));

	VALUE_TYPE(BVT_BE_UINT16, read_u16be, sizeof(uint16_t));
	VALUE_TYPE(BVT_BE_UINT24, read_u24be, 3 * sizeof(uint8_t));
	VALUE_TYPE(BVT_BE_UINT32, read_u32be, sizeof(uint32_t));
	VALUE_TYPE(BVT_BE_UINT64, read_u64be, sizeof(uint64_t));
	VALUE_TYPE(BVT_BE_FLOAT,  read_fltbe, sizeof(float));

	VALUE_TYPE(BVT_LE_UINT16, read_u16le, sizeof(uint16_t));
	VALUE_TYPE(BVT_LE_UINT24, read_u24le, 3 * sizeof(uint8_t));
	VALUE_TYPE(BVT_LE_UINT32, read_u32le, sizeof(uint32_t));
	VALUE_TYPE(BVT_LE_UINT64, read_u64le, sizeof(uint64_t));
	VALUE_TYPE(BVT_LE_FLOAT,  read_fltle, sizeof(float));

	default:
		return SR_ERR_ARG;
	}

#undef VALUE_TYPE

	if (out)
		*out = value;
	return SR_OK;
}

SR_PRIV int bv_get_value(float *out, const struct binary_value_spec *spec,
	const uint8_t *data)
{
	float value;
	const uint8_t *ptr;

	ptr = &data[spec->offset];

	switch (spec->type) {
	case BVT_UINT8:
		value = read_u8(ptr);
		break;
	case BVT_BE_UINT16:
		value = read_u16be(ptr);
		break;
	case BVT_BE_UINT24:
		value = read_u24be(ptr);
		break;
	case BVT_BE_UINT32:
		value = read_u32be(ptr);
		break;
	case BVT_BE_UINT64:
		value = read_u64be(ptr);
		break;
	case BVT_BE_FLOAT:
		value = read_fltbe(ptr);
		break;
	case BVT_LE_UINT16:
		value = read_u16le(ptr);
		break;
	case BVT_LE_UINT24:
		value = read_u24le(ptr);
		break;
	case BVT_LE_UINT32:
		value = read_u32le(ptr);
		break;
	case BVT_LE_UINT64:
		value = read_u64le(ptr);
		break;
	case BVT_LE_FLOAT:
		value = read_fltle(ptr);
		break;
	default:
		return SR_ERR_ARG;
	}

	if (out)
		*out = value;
	return SR_OK;
}
Commit	Line	Data
18698b40 AS	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2020 Andreas Sandberg <andreas@sandberg.pp.se>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include <glib.h>
	22	#include <libsigrok/libsigrok.h>
	23	#include "libsigrok-internal.h"
	24
48b7c901	25	SR_PRIV int bv_get_value_len(float out, const struct binary_value_spec spec,
1fa04876	26	const uint8_t *data, size_t length)
18698b40 AS	27	{
	28	float value;
	29
	30	if (!out \|\| !spec \|\| !data)
	31	return SR_ERR_ARG;
	32
	33	#define VALUE_TYPE(T, R, L) \
	34	case T: \
	35	if (spec->offset + (L) > length) \
	36	return SR_ERR_DATA; \
	37	value = R(data + spec->offset); \
	38	break
	39
	40	switch (spec->type) {
e7fe5bb4	41	VALUE_TYPE(BVT_UINT8, read_u8, sizeof(uint8_t));
18698b40	42
e7fe5bb4	43	VALUE_TYPE(BVT_BE_UINT16, read_u16be, sizeof(uint16_t));
d6b236ef	44	VALUE_TYPE(BVT_BE_UINT24, read_u24be, 3 * sizeof(uint8_t));
e7fe5bb4 GS	45	VALUE_TYPE(BVT_BE_UINT32, read_u32be, sizeof(uint32_t));
	46	VALUE_TYPE(BVT_BE_UINT64, read_u64be, sizeof(uint64_t));
	47	VALUE_TYPE(BVT_BE_FLOAT, read_fltbe, sizeof(float));
18698b40	48
e7fe5bb4	49	VALUE_TYPE(BVT_LE_UINT16, read_u16le, sizeof(uint16_t));
d6b236ef	50	VALUE_TYPE(BVT_LE_UINT24, read_u24le, 3 * sizeof(uint8_t));
e7fe5bb4 GS	51	VALUE_TYPE(BVT_LE_UINT32, read_u32le, sizeof(uint32_t));
	52	VALUE_TYPE(BVT_LE_UINT64, read_u64le, sizeof(uint64_t));
	53	VALUE_TYPE(BVT_LE_FLOAT, read_fltle, sizeof(float));
18698b40 AS	54
	55	default:
	56	return SR_ERR_ARG;
	57	}
	58
	59	#undef VALUE_TYPE
	60
e7fe5bb4 GS	61	if (out)
e7fe5bb4 GS	62	*out = value;
18698b40 AS	63	return SR_OK;
18698b40 AS	64	}
9697b4a5 MP	65
	66	SR_PRIV int bv_get_value(float out, const struct binary_value_spec spec,
	67	const uint8_t *data)
	68	{
	69	float value;
	70	const uint8_t *ptr;
	71
	72	ptr = &data[spec->offset];
	73
	74	switch (spec->type) {
	75	case BVT_UINT8:
	76	value = read_u8(ptr);
	77	break;
	78	case BVT_BE_UINT16:
	79	value = read_u16be(ptr);
	80	break;
	81	case BVT_BE_UINT24:
	82	value = read_u24be(ptr);
	83	break;
	84	case BVT_BE_UINT32:
	85	value = read_u32be(ptr);
	86	break;
	87	case BVT_BE_UINT64:
	88	value = read_u64be(ptr);
	89	break;
	90	case BVT_BE_FLOAT:
	91	value = read_fltbe(ptr);
	92	break;
	93	case BVT_LE_UINT16:
	94	value = read_u16le(ptr);
	95	break;
	96	case BVT_LE_UINT24:
	97	value = read_u24le(ptr);
	98	break;
	99	case BVT_LE_UINT32:
	100	value = read_u32le(ptr);
	101	break;
	102	case BVT_LE_UINT64:
	103	value = read_u64le(ptr);
	104	break;
	105	case BVT_LE_FLOAT:
	106	value = read_fltle(ptr);
	107	break;
	108	default:
	109	return SR_ERR_ARG;
	110	}
	111
	112	if (out)
	113	*out = value;
	114	return SR_OK;
	115	}